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Old 06-16-2020, 11:08 AM   #3
truckster
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Join Date: Jan 2001
Location: Orem, Utah
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Re: 89 S10 4.3 misfire

They're probably not directly related to your misfire. While some of them are low, early gasoline engines ran with 5:1 compression ratios.

However, as Aussie said, #2 readings indicate you may have some blow-by, causing spark plug fouling. How does that plug look?
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